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Obviously some of the dates below are tentative. We will update users as and when we have more certainty about progress.
Timetable of System Session starting on 8 September
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Date | Time (UTC) | Event | Impact | User action |
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8 Sep | 09:30 | Start of DHS Move Change configuration of all services using MARS/ECFS to point to the temporary DHS in Bologna. | Check service status | |
09:30 - 10:30 | Drain all MARS/ECFS activity in DHS infrastructure in Reading | All active/queued MARS retrieve requests and ECFS get operations on the DHS in Reading will fail. | Please re-run to test behaviour expected during DHS Move. | |
w/c 12 Sep | MARS/ECFS/HPSS metadata transfer to Bologna. Start DHS infrastructure in Bologna (DHS-Blank) | Short interruption. Stop writing new data into temporary-DHS and start archive/store to production MARS/ECFS in Bologna. | Check service status | |
from 14 Sep | Physical relocation starts: tapes, tape libraries, disks, servers start being shipped to Bologna | |||
w/c |
3 Oct | First data |
Check service status
started appearing in Bologna:
| Short interruptions | The type of data becoming available |
:
Try resuming work for the above. Failures may occur as not all streams/types/levtypes are available. |
w/c 10 Oct |
Additional 1.5 PiB disk cache of popular data | Short interruptions | The type of data becoming available:
Try resuming work for the above. Failures may occur as not all class/streams/types/levtypes are available. | ||
w/c 24 Oct | The first of five tape libraries shipped from Reading to Bologna was put in production on . This provides access to additional 4,000 tape cartridges, mostly operational data. | The type of data becoming available:
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w/c 31 Oct | Three additional tape libraries were put in production this week. | System sessions on tape libraries required | The type of data becoming available:
Users are encouraged to resume their work, noting that some RD, Re-Analysis and TIGGE data may still be unavailable. | |
w/c 7 Nov | One tape library left to complete the DHS Move | System sessions on tape libraries required | Check service status | |
| End of DHS Move | Access to full MARS/ECFS | Check service status |
Log output samples of execution at various stages
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